Skandapurana 5.46.8

5.46.8

tato mūko'pi bālopi maṃtribhistasya bhūpateḥ ..
sa sutaḥ sthāpito rājye abhāve'nyasutasya ca .. 8 ..

Then, though mute and still a child, by the ministers of that king / that son was established on the throne, in the absence of another son.